Patent US2635168A successfully refreshed from Google Patents.
US2635168A
Expired / Lapsed
US
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Eddy current heater
Assignee: PAKCO Co
•
Filing: 1950-11-04
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Granted: 1953-04-14
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Expires: 1970-11-04
Abstract
No abstract record available.
Inventors
- 👤 Francis F Lerza
- 👤 Earl S Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US402416A
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US442649A
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US477628A
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US1701156A
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US1533226A
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US1835602A
Cited
US1989582A
Cited
CH191804A
Cited
US2178720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |